<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box{
            height: 200px;
            padding: 0 200px;
            position: relative;
        }
      .left,.right{
          width: 200px;
          height: 100%;
          background: yellow;
         
      }
      .left{
            /* position: absolute;
            left: 0px;
            top: 0px; */

            float: left;
            margin-left: -200px;
      }
      .right{
            /* position: absolute;
            right: 0px;
            top: 0px; */

            float: right;
            margin-right: -200px;
      }
      .content{
          background: yellowgreen;
          height: 100%;
      }
    </style>
</head>
<body >
   <div class="box">
        <div class="left"></div>
        <!-- <div class="content"></div> -->
        <div class="right"></div>
        <div class="content"></div>
       
</body>
</html>                                                                                      